Good morning and I hope you are well. I am trying to analyse data from the COVID-19 survey and I have a question.
I am interested in home-schooling outcomes. When I run regressions with the SVY command in stata hundreds of strata are omitted from estimation (about 200-300 participants are therefore omitted). What I am doing for the moment is to treat the strata with single sampling units as certainty units. Do you think this is right? Are there any available corrections? Should I merge single units?